Telephone receiver



Juxxe 15 v1926.V

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L.. R. GOLLADAY TELEPHONE RECEIVER Filed April 25 1924 INVENTOR BY aaa/@7" Za/MV ATTORNEY is i riiticn. is @rinsed to take place in the ux passing through thc diaphragm, and eddy curren looses, as weil as other iron losses in 'the magnet-body, are ilvoidcd.

1Niie Li'. have shown only one ernboiii` ment of my invention in the accompanying dm'evings, it capable of various changes imei modifications Without departing from the spirit thereof, and it is desired, there fore, that oniy :auch limitations simil be inii- @cocci iiereon are indicated in ,the prior nrt or indicated in the appended., c'ieinis.

ticino es my ii'rvention: l Y ii teiepiionc receiver, a. inzignctic circuit comprising n, iiisiphrngm, a permanent mfiet, a pair ci' pole pieces thereon 'of er incren'icnizii permeability than the crient magnet, said pole pieces having portions forming a magnetic s'iiunt, and fr sourceof alternating magn'etomotive 'force associated with said magnetic shunt.

2. in ,a telephone receiver, e diaphragm, a magnetic circuitcomprising u, pair of members of high incremental permeability and said diaphragm, 'si pernmnent magnet associated with seid; magnetic circuit for establishing a steady iiux through two portions of seid magnetic circuit in parallel, und a coil associated with said magnetic circuit for establishing e, Varying' flux: through said portions' in Series.

in testimony whereof, i have hereunto subscribed my naine this-17th ciay ci April, 1921i. v

LAWRENCE GLLADAY. 

